스마트 컨트랙트 기반의 산업제어시스템 접근 제어 메커니즘

Industrial control systems consist of various physical devices such as sensors, actuators. Security Infringement such aswaterworks facilities Remote Access Infringement and power control systems Infection have been occured by vulnerability ofAccess Control. Access control to physical devices must be fulfilled with a reliable system. However, Having a singleaccess control system inside company can not guarantee reliability. In addition, when single access control is struggled witherror or infringement, access control system is totally unavailable. so system requires a additional access control method orsystem. In this paper, we proposed access control mechanism for reliable and stable operation using blockchain and smartcontract. Proposed Mechanism using trust score to consider resources to be consumed depending on each industrialenvironment in consideration of the industrial control system where availability is more important than integrity andconfidentiality. Unlike other blockchain-based access control system, proposed system is designed for the currently operatingindustrial control system.